20330311212221 has 8 divisors (see below), whose sum is σ = 20376686957088. Its totient is φ = 20283945318000.

The previous prime is 20330311212209. The next prime is 20330311212241. The reversal of 20330311212221 is 12221211303302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20330311212221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20330311212241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1677686 + ... + 6593576.

It is an arithmetic number, because the mean of its divisors is an integer number (2547085869636).

Almost surely, 2^{20330311212221} is an apocalyptic number.

It is an amenable number.

20330311212221 is a deficient number, since it is larger than the sum of its proper divisors (46375744867).

20330311212221 is an equidigital number, since it uses as much as digits as its factorization.

20330311212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4925323.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20330311212221 its reverse (12221211303302), we get a palindrome (32551522515523).

The spelling of 20330311212221 in words is "twenty trillion, three hundred thirty billion, three hundred eleven million, two hundred twelve thousand, two hundred twenty-one".